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Sonnax Smart-Tech input housing kits address the weak areas of 4-speed automatic transmissions. Flexing and bowing of OEM and other aftermarket backing plates is eliminated with Sonnax's heavy-duty bolt-on anchoring plates. Their unique design ensures even clamping of the 3-4 clutches in higher horsepower, higher pressure applications. By eliminating the 3-4 snap ring and using a thinner, yet stiffer apply plate, space is made available for additional frictions and steels. This makes it possible to simultaneously increase clutch torque capacity and eliminate the possibility of retaining ring blow-out. A steel reinforcement sleeve prevents breakage in the spline area. Housing fatigue/failure-resistance and housing life are significantly improved with a special treatment process that greatly reduces stress crack formation.
( 4 )
$1,537.27
Summit Bucks
Failure of the intermediate stub shaft and direct drum are almost inevitable when transmissions are pushed to the limit. To maximize durability and improve clutch capacity in heavy-duty/performance vehicles, Sonnax offers Smart-Tech direct clutch drum and shaft kits, the first upgrade to eliminate every critical weakness. Most failures in these units occur where the direct drum and stub shaft connect. Even other aftermarket upgrades that rely on a heavy-duty shaft will sheer in this area under extreme conditions. Unlike two-piece assemblies, the all-in-one Smart-Tech easily handles the highest horsepower/torque levels. The unique one-piece clutch drum with integrated stub shaft is precision machined from high-strength steel to guarantee there are no splines to strip from the drum or weaken the shaft. The shaft itself is significantly thicker and 2 times stronger than the original. Due to its larger diameter, the integrated shaft must be used with the kit's custom, heavy-duty sun gear. Insufficient holding power is another area where many transmissions fall short, but installing thinner aftermarket steels and backing plates to increase clutch capacity isn't ideal. Those components increase clutch pack flex and heat build-up, making them the primary cause of repeat burn-up. To improve both performance and long-term reliability, the Smart-Tech's custom drum and piston hold an OE backing plate and seven OE frictions for 17 percent more clutch capacity than the six-friction stack-up. Sonnax Smart-Tech direct clutch drum and shaft kits feature: * One-piece design that eliminates weak point where drum splines strip and shafts break * Rugged shaft is 50 percent thicker and twice as strong as OE * Custom drum and piston deliver 17 percent more clutch capacity with optimum protection against burn-up * High-strength drum and shaft are precision-machined from hardened 8620 steel * Unique sun gear is precision-machined from 9310, heat-treated steel
( 1 )
$1,537.27
Summit Bucks
Based on an ultra-durable, one-piece forging, Sonnax Smart-Tech input shaft and piston kits have a hub with longer front clutch splines. Combining longer splines with a thinner billet aluminum direct piston allows for one extra OE thickness direct friction plate, while keeping original thickness steels, backing plate, original retaining ring and OE clutch clearances.
( 1 )
$1,836.30
Summit Bucks
Pay for what you need and get the quality you want--Sonnax planetary assemblies allow you to choose your level of performance. Their extreme assemblies offer the very best for the most demanding applications with advanced process sun and pinion gears. The 3-step process--cryogenic tempering, shot-peening, and super finish--develops gears with improved grain structure and stability, so they are tougher, more wear-resistant, and better performing. Extreme assemblies are available in four ratios, two flange tooth counts, and two output shaft lengths. Performance, quality, and value--Sonnax extreme planetary assemblies deliver them all. Sonnax extreme assemblies may feature: * Gear ratios: 1.80, 1.69, 1.58, 1.65 * 9310 advanced process sun and pinion gears * 12-tooth or 24-tooth billet clutch drum flange * HY-Tuf or 300M rolled spline long OE or short output shafts * High-strength, steel-backed, PTFE thrust washers * Maximum-duty ring gear
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$1,664.88
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$1,696.76
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